Question

What is not true of two genes that show $50\%$ recombination frequency?

• A. They undergo more than one crossovers in every meiosis
• B. The genes are present on different chromosomes
• C. The genes are tightly linked
• D. The genes show independent assortment

Answer 1

The correct option is C The genes are tightly linked

The tightly linked genes on chromosomes show 100% parental types and 0% recombinants. Two genes that undergo independent assortment indicated by a recombination frequency of 50% are either on non-homologous chromosomes are located far apart on a single chromosome. As the distance between two genes increases, crossover frequency increases. More recombinant gametes, fever parental gametes.

So, the correct answer is 'The genes are tightly linked'.